Configure ArgoCD for private repo access

- Update repo URLs from HTTPS placeholder to git@github.com:lazorgurl/homelab.git
- Update container image refs from OWNER to lazorgurl
- Set KUBECONFIG env in Taskfile
- Fix kubeconfig-fetch.sh to auto-detect server IP from inventory
- Fix Ansible: callback plugin, br_netfilter ordering, ssh service name

infra/ansible/ansible.cfg

@@ -5,8 +5,10 @@ remote_user = julia
 private_key_file = ~/.ssh/homelab
 host_key_checking = False
 retry_files_enabled = False
-stdout_callback = yaml
+stdout_callback = ansible.builtin.default
+result_format = yaml
 callbacks_enabled = profile_tasks
+vault_password_file = ~/.vault_pass_homelab
 
 [privilege_escalation]
 become = True